Lecture Exam 2

A  an organism that doesn’t use oxygen but tolerates it

B  an organism that uses oxygen when present or grows without oxygen when absent

C  an organism that requires less oxygen than is present in air

D  an organism that is killed by oxygen

A  psychrophile â growth at 15°C

B  hyperthermophiles â growth at 85°C

C  thermophile â growth at 50°C

D  mesophile â growth at 0°C

A  only at low pH.

B  pH 7.0, but survive at low pH.

C  low pH, but survive at high pH.

D  only at high pH.

E  high pH, but survive at low pH.

A  obligate anaerobes

B  facultative anaerobes

C  neutrophiles

D  alkaliphiles

A  storage

B  survival

C  reproduction

D  protein synthesis

A  halophiles

B  mesophiles

C  psychrophiles

D  thermophiles

A  naturally occurring antibiotics

B  low water activity

C  toxic alkaline chemicals

D  low pH

A  psychrophiles

B  mesophiles

C  thermophiles

D  halophiles

A  psychrotrophs

B  thermophiles

C  hyperthermophiles

D  mesophiles

A  thermophile

B  acidophile

C  psychrophile

D  mesophile

A  that they grow well at low oxygen

B  that they grow well at high pressure

C  that they grow well at low pH

D  that they grow well at high pH

E  that they grow well at low oxygen

A  none of these

B  An individual that has been exposed to an infectious microorganism and the microorganism is replicating, but microorganism numbers have not yet reached levels necessary to produce visible symptoms.

C  An individual that is suffering maximum host cell damage and is manifesting clear and distinct symptoms of the particular disease.

D  An individual that has survived the acute phase of the disease because of an effective immune system and/or because of effective treatment.

A  acidophile.

B  aerotolerant anaerobe.

C  obligate aerobe.

D  osmotolerant.

E  facultative anaerobe

A  they lack the correct atmospheric pressure

B  they lack the correct salt concentration

C  they lack the correct enzymes

D  they lack the correct pH

E  they lack the correct nucleus

A  a heterotroph

B  a chemotroph

C  a phototroph

D  a chemoheterotroph

A  phase-contrast microscopy

B  dark-field microscopy

C  bright-field microscopy

D  scanning electron microscopy

E  fluorescence microscopy

A  darkfield microscope

B  compound light microscope

C  phase contrast microscope

D  electron microscope

E  fluorescent microscope

A  transmission electron

B  phase-contrast

C  dark-field

D  bright-field

E  scanning electron

A  light penetration

B  size

C  diameter.

D  length.

A  the microscope’s magnification.

B  the microscope’s clarity.

C  the minimum cell size of a cell.

D  the microscope’s resolution.

A  scanning electron microscopy

B  UV microscopy

C  differential interference contrast (DIC)

D  brightfield microscopy

E  darkfield microscopy

A  surface structure of fixed cells.

B  internal structure of live, living cells.

C  internal structure of fixed cells.

D  surface membranes of live, living cells.

A  fluorescent bacteria on a dark background.

B  dark bacteria on a dark background.

C  bright bacteria on a dark background.

D  dark bacteria on a bright background.

E  bright bacteria on a bright background.

A  no relationship on

B  higher

C  the same

D  lower

A  axial filament

B  plasma membrane

C  pilum

D  fimbria

A  log, lag, and death phases would all have roughly the same number of endospores.

B  log phase

C  death phase

D  lag phase

A  they can cause antibiotic resistance

B  they are used in DNA exchange

C  they are used in motility

D  more than one of the answers are correct

E  none of these are correct

F  they are used in attachment

A  peritrichous

B  monotrichous

C  monotrichous

D  lophotrichous

A  all of these

B  the production of exotoxins or endotoxins.

C  the presence of anatomical structures such as pili.

D  the production of various enzymatic activities such as hemolysins and leucocidins

A  thermophiles

B  acidophiles

C  halotolerant

D  barophiles

A  colony formation

B  nutrient surplus

C  adverse environmental stress

D  need for reproduction

A  adhesins

B  phagocytosins

C  attachments

D  hormones

A  attachment increases motility

B  attachment increases endospore formation

C  attachment increases the exchange of genes

D  attachment increases parasitic damage to the host

A  plasmids

B  chlorophyll

C  a nucleus

D  ribosomes

A  outermost living part of bacterial cell

B  selectively permeable

C  contains proteins

D  maintains cell shape

E  composed of a phospholipid bilayer